the act of showing off your 'well exercised right arm' in a battle of an arm wrestle, usually ending up with the 'Jason' as a winner. unless the 'Jason' loses, he/she becomes saltier than the sea.
*arm wrestle commences*
guy 1: why is Jason doing an arm wrestle again?
guy 2: dunno ask him
guy 3: don't bother, it's...Jasonism
*arm wrestle finishes (the 'Jason' wins)*
guy 3: see... Jasonism
by XxAdyssonxX May 30, 2017
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The religion of all religions. Jasonism includes all religions within it's hold. Everyone is a follower of Jasonsim. If you believe in something, you're a follower, simple as that. It is named after it's great creator, "Jason"
"Hey, what do you believe in?"
"Nothing"
"You are a follower of Jasonism; you believe in the concept of nothing"

I am a follower of Jasonism.
by aaaaayum (Jason) December 07, 2008
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The abiltiy to predict percentages of occurring things, sometimes magically from thin air, and have them become fact. Also, facts and sayings are backed up "unnamed" freinds who can either be reached by phone but are never actually dialed, or who have first hand knowledge. The first hand knowledge people have names that no one in the group receivcing the Jasonism has ever heard of.

Also followers of Jasonism hoarde cell phones in packs.

*note* also may have the ability to read a POPZ mind.
70% of the kids in school believe we should bring back flag team groupies.

thats a jasonism

I just went to the mall and everyone on earth shops at PacSun.
Jasonism, hands down

There are at least 9 openly happy people at the high school.
by vilefileman November 23, 2010
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The belief in Magic as defined by millions of High School intellectuals.
John: "How was the Earth formed?"
Jason: "Magic."
John: "Isn't that Jasonism?"
Jason: "No, it's the truth."
by Xairu February 27, 2009
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Jason is a sarcastic person, but when you get to know him he will talk and joke around with you. He is a hopeless romantic that dreads being alone. He calls the woman that he loves beautiful not hot. He makes sure the lucky girl he has in his life is ok at all times. He tries to be a good guy to everyone and is always trying to clear his past.
by Not Jason Powers October 07, 2018
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A jason is a EXTREMELY sarcastic guy. He may act like an asshole but behind all that he really cares about everyone in his life. If a Jason talks to you, consider yourself lucky that means he really cares about you even though he has a funny way of showing it sometimes. Jason's are great in bed and are known for looking at weird crap on the Internet. Jason's are the best friends and are usually always happy.
Nancy: Jason made me cry but I know he still loves me.
Judith: yup that's a Jason for you!

Nancy: so glad I have a Jason in my life!
by Momentummaker November 19, 2012
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Everyone knows a Jason. Jason’s are probably popular and well- known. Jason’s are very smart, kind and probably have a secret artistic side. Jason’s can sometimes be athletic, probably likes sports such as Golf or Frisbee. Jason’s May seem cool and chill but lowkey kinda sensitive and want people to like them. Jason’s make the best friends, so if you know a Jason, keep them close. Jason’s will do anything for the people they love, but may not be appreciated all the time. Jason’s usually get nervous around people they like. Jason’s can either be super hot, kinda nerdy, or both. Most likely to be on student council or a club president. Jason’s are overall amazing people and you are lucky if you have a Jason in your life !
Person 1: Ugh Jason is so hot
Person 2: Yesterday when he was taking photos outside and he looked RIGHT AT ME
Person 1: OMG RLY??

Person 2: ya, I’ll talk to him tmr, he seems super chill.

Person 1: not if I talk to him first!
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